City of Laramie Mosquito Control has scheduled the aerial application of Bacillus thuringensis israelensis (Bti) for Tuesday, May 27th.

This application of biological larvacide is targeted to control nuisance mosquito larvae in irrigated areas and floodwater southwest and northwest of Laramie.

Areas to be treated include; acreages along the Big Laramie River from the City limits near Cottonwood estates to approximately 10 miles southwest of Laramie, and acreages north of Curtis Street between Welsh Lane and US Hwy 30 (North 3rd Street) approximately two miles north of Laramie.

The bacteria applied are environmentally friendly and does not harm fish, amphibians, mammals or other aquatic insects. The application is scheduled to begin at daylight and should conclude by early afternoon.

If inclement weather prohibits the application it will be re-scheduled for Wednesday morning May 28th at the same time.

No application will be made within the City limits. For more information visit